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Texas Instruments TPS561208DDCR
- Part No.:
- TPS561208DDCR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
TPS561208DDCR.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:5,943
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Product details
Overview
TPS561208DDCR from Texas Instruments is a 1-A synchronous step-down DC-DC converter in a 6-pin SOT-23 (DDC) package, designed for fixed-frequency continuous conduction mode (CCM) operation at 580 kHz. It accepts 4.5 V to 17 V input and delivers adjustable output from 0.76 V to 7 V with ±2% feedback voltage accuracy at 25°C, integrated 140-mΩ high-side and 84-mΩ low-side MOSFETs, and supports ceramic/polymer output capacitors without external compensation. It targets compact power rails in digital consumer electronics.
For engineers reviewing the TPS561208DDCR datasheet, TPS561208DDCR pinout, TPS561208DDCR application, or TPS561208DDCR equivalent, key selection criteria include its D-CAP2™ control architecture for fast transient response, hiccup-mode overcurrent protection, 1-ms fixed soft start, pre-biased startup capability, and thermal shutdown at 160°C - all within a 1.6 × 2.9 mm footprint rated for –40°C to 125°C junction temperature.
Technical Context
The TPS561208DDCR implements D-CAP2™ adaptive on-time control, combining internal ramp-based pseudo-fixed frequency operation with zero-ripple stability across low-ESR ceramic and polymer capacitors. Its control loop eliminates need for external compensation while maintaining phase margin via an inherent high-frequency zero.
Unlike the pulse-skip TPS561201 variant, the TPS561208DDCR operates exclusively in continuous conduction mode (CCM) at 580 kHz, delivering regulated output down to light loads without frequency modulation - enabling predictable EMI behavior and consistent filter design. Protection includes cycle-by-cycle current limiting, non-latching undervoltage lockout (UVLO), and thermal shutdown with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 17 V - supports wide-input industrial and consumer DC bus rails including 5 V, 9 V, 12 V, and 15 V supplies. |
| Output Voltage Range | 0.76 V to 7 V - programmable via external resistor divider; enables core voltage regulation for SoCs, FPGAs, and microcontrollers. |
| Switching Frequency | 580 kHz - fixed quasi-constant frequency simplifies EMI filtering and inductor selection; stable across input and load variations. |
| Output Current | 1 A continuous - sufficient for powering DDR memory, USB peripherals, and video processing ICs in compact designs. |
| Feedback Accuracy | ±2% at 25°C - ensures tight output regulation under nominal conditions; critical for sensitive analog and mixed-signal subsystems. |
| Shutdown Current | <10 µA - enables ultra-low-power standby states in battery-backed or energy-conscious systems. |
| Thermal Shutdown | 160°C with 25°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
Pinout & Package
TPS561208DDCR uses a 6-pin SOT-23 (DDC) package measuring 1.6 mm × 2.9 mm, optimized for space-constrained layouts and compatible with standard SMT reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Power and signal ground reference | Return path for low-side FET and controller logic; must be connected to single-point ground near VFB to minimize noise coupling. |
| SW | Switch node | Connection between high- and low-side MOSFETs; carries high di/dt switching current - requires short, low-inductance routing to minimize ringing. |
| VIN | Main input supply | Drain terminal of high-side FET; must be decoupled with ≥10 µF ceramic capacitor close to pin to suppress input ripple and supply transients. |
| VFB | Feedback input | Senses output voltage via resistor divider; internal 0.768 V reference sets regulation point; input bias current <±0.1 µA minimizes divider error. |
| EN | Enable control | Active-high logic input; threshold is 1.6 V (min); internal pull-down allows default-disable; supports sequencing and power-good coordination. |
| VBST | Bootstrap supply | Provides gate drive voltage for high-side FET; requires 0.1 µF ceramic capacitor between VBST and SW to sustain bootstrap charge during each switching cycle. |
Key Features
| Feature | Design Value |
|---|---|
| D-CAP2™ control mode | Enables stable operation with ultra-low-ESR ceramic capacitors and eliminates external compensation components - reducing BOM count and layout complexity. |
| Fixed 1-ms soft start | Prevents inrush current and output overshoot during power-up; supports safe ramp-up into pre-biased outputs without reverse current flow. |
| Hiccup-mode OCP | Enters timed restart cycle (15 ms off, then retry) upon overcurrent detection - protects MOSFETs and magnetics during sustained fault conditions. |
| Non-latching UVLO & TSD | Shuts down cleanly when VIN drops below 3.6 V or junction exceeds 160°C, then auto-resumes when conditions normalize - avoids system lockup. |
| Low shutdown current (<10 µA) | Minimizes quiescent drain in always-on subsystems such as remote controls, IoT sensors, or standby power domains. |
Applications
| Digital TV Power Supply | High Definition Blu-ray™ Disc Player |
|---|---|
Use Scenario: Supplies 1.05 V/1 A core voltage to main SoC and 3.3 V auxiliary rail for HDMI interface and flash memory. IC Role / Device Role / Timing Role: Primary buck regulator delivering tightly regulated, low-noise DC power with fast transient response to handle video decode bursts. Use Value: D-CAP2™ control maintains output stability during rapid load steps up to 1 A, reducing required output capacitance by >30% versus traditional voltage-mode controllers. | Use Scenario: Powers laser driver IC, servo motor controller, and MPEG decoder ASIC from a 12 V intermediate bus. IC Role / Device Role / Timing Role: Compact, high-efficiency point-of-load regulator operating in CCM to ensure consistent timing margins for real-time servo control loops. Use Value: 580-kHz fixed switching frequency enables predictable EMI filtering and meets CISPR-32 Class B radiated emission limits without shielding. |
| Networking Home Terminal | Surveillance Camera System |
Use Scenario: Generates 1.2 V for Wi-Fi SoC and 5 V for PoE-powered Ethernet PHY in compact gateway devices. IC Role / Device Role / Timing Role: Secondary buck converter providing isolated, low-noise power for RF-sensitive communication interfaces. Use Value: 1.6 × 2.9 mm SOT-23 package fits within dense RF layout zones; low shutdown current extends battery backup runtime during AC loss. | Use Scenario: Delivers 1.8 V to image sensor and 3.3 V to video encoder in IP camera modules with thermal constraints. IC Role / Device Role / Timing Role: Thermally robust DC-DC stage handling ambient temperatures up to 70°C ambient with derated 125°C junction limit. Use Value: Integrated 140-mΩ/84-mΩ FETs achieve >90% efficiency at 1 A/3.3 V, minimizing heat generation in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS561201DDCR | Pulse-skip Eco-mode instead of CCM; higher light-load efficiency but variable switching frequency. | Better suited for battery-powered devices with intermittent activity; less suitable for EMI-sensitive or timing-critical applications. | Select TPS561201DDCR only if light-load efficiency dominates over EMI predictability and frequency stability. |
| MP2315DJ-LF-Z | Monolithic 2-A buck with 2.5-V to 17-V input, 500-kHz fixed frequency, and different pinout (8-pin SOIC-EP). | Higher current rating and thermal performance; requires PCB redesign due to larger package and different pin assignment. | Choose MP2315DJ-LF-Z when 1-A headroom is insufficient or board-level thermal management demands enhanced dissipation. |
Compared with TPS561208DDCR, the TPS561201DDCR trades CCM stability for Eco-mode efficiency at light loads, while the MP2315DJ-LF-Z offers higher current and thermal headroom at the cost of larger footprint and non-pin-compatible layout - making TPS561208DDCR optimal for space-constrained, fixed-frequency, 1-A applications requiring minimal external components.
Availability
TPS561208DDCR is available at Aetrix Electronics and suitable for digital TV power supplies, HD Blu-ray disc players, and networking home terminals requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for TPS561208DDCR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability power conversion ICs.
The TPS56120x product line was engineered for space-constrained, cost-sensitive consumer electronics requiring simple, efficient, and robust point-of-load regulation - emphasizing minimal external components, fast transient response, and seamless integration into compact PCB layouts.
FAQ
What is the recommended input capacitor configuration for TPS561208DDCR?
TI recommends a minimum 10-µF X5R/X7R ceramic capacitor placed as close as possible to the VIN and GND pins of the TPS561208DDCR, plus an optional 0.1-µF high-frequency ceramic capacitor from VIN to GND. This configuration suppresses input ripple and high-frequency noise while supporting peak current demands during switching transitions. The capacitor voltage rating must exceed the maximum input voltage (17 V), with 25-V rating strongly advised for margin.
Does TPS561208DDCR support pre-biased output startup?
Yes, the TPS561208DDCR supports pre-biased soft start: when the EN pin is asserted high while the output is already biased, the device delays switching until its internal reference voltage ramps above the sensed VFB voltage. This prevents reverse current flow through the low-side FET and ensures monotonic, controlled ramp-up - critical for systems with multiple power rails or hot-plug scenarios where output capacitors may retain residual charge.
What is the purpose of the VBST pin on TPS561208DDCR?
VBST on the TPS561208DDCR supplies gate drive voltage to the high-side N-channel MOSFET. It requires a 0.1-µF ceramic capacitor connected between VBST and SW to form a bootstrap circuit that replenishes charge lost during each high-side conduction period. Without this capacitor, the high-side FET cannot turn on fully, resulting in excessive conduction losses, thermal stress, or complete failure to regulate output voltage.
How does the D-CAP2™ control mode improve transient response in TPS561208DDCR?
D-CAP2™ control in the TPS561208DDCR eliminates external compensation by embedding adaptive on-time modulation and an internal ramp generator. This architecture directly senses output voltage deviation and adjusts on-time within one switching cycle, achieving sub-10-µs response to load steps. As a result, fewer output capacitors are needed to meet transient voltage deviation specs - e.g., ±5% for 1-A step - reducing solution size and cost versus traditional voltage-mode or current-mode controllers.
Can TPS561208DDCR operate with ceramic output capacitors only?
Yes, the TPS561208DDCR is specifically designed to operate stably with ultra-low-ESR ceramic capacitors - including X5R, X7R, and NP0 types - without requiring additional series resistance or external compensation. Its D-CAP2™ control inherently compensates for near-zero output ripple, enabling use of compact, high-capacitance MLCC arrays (e.g., 22 µF ×2) that reduce board area and improve high-frequency noise suppression compared to electrolytic or polymer alternatives.
TPS561208DDCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SWIFT™
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 17V
- Voltage - Output (Min/Fixed):
- 0.76V
- Voltage - Output (Max):
- 7V
- Current - Output:
- 1A
- Frequency - Switching:
- 580kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS561208DDCR FAQ
1.How can I place an order for TPS561208DDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS561208DDCR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS561208DDCR reliable?
The price and inventory of TPS561208DDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS561208DDCR is usually 5 days.
3.What payment methods are accepted for TPS561208DDCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS561208DDCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS561208DDCR?
TPS561208DDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS561208DDCR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS561208DDCR?
For technical support, including TPS561208DDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS561208DDCR requirements.
6.How does Aetrix verify that TPS561208DDCR is sourced from the original manufacturer or authorized distributors?
All TPS561208DDCR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS561208DDCR meets industry standards.
7.What is the process for return or replacement of TPS561208DDCR?
All TPS561208DDCR units undergo pre-shipment inspection (PSI). If there is an issue with TPS561208DDCR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS561208DDCR part is unused and in its original packaging.
Return procedure for TPS561208DDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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